Non-contact type information card and communication system

Details Non-contact type information card and communication system Non-contact type information card and communication system

1991-09-09

1993-03-02

Sikes, William L.

Registers

Systems controlled by data bearing records

235377, 235380, 235382, 235492, G06K 710

Patent

active

051911922

ABSTRACT:
A non-contact type information card includes a modulating/demodulating circuit, an antenna circuit, a CPU, a RAM, and a clock signal generating circuit. In the non-contact type information card, when the modulating/demodulating circuit receives a new command signal, the CPU determines whether first and second identification information in the new command signal agrees with the first and second identification information in an old command signal. When the first and second identification information of the new command signal agree with that of the old command signal, the CPU stops the operation of the clock generating circuit until the next command signal is received.

REFERENCES:
patent: 4501958 (1985-02-01), Glize et al.
patent: 4538056 (1985-08-01), Young et al.
patent: 4780602 (1988-10-01), Kawang et al.
patent: 5068521 (1991-11-01), Yamaguchi

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